Gypsum pwm no yog tsim los ntawm cov hnab yas hmoov plab gypsum.Yog hais tias cov duab kos los, cov ntaub ntawv yuav tsum tau ua raws li cov ntaub ntawv thiab daim ntawv yuav tsum tau.Yog hais tias cov khoom siv, peb yuav ua tiav cov pwm ntawm tes av, rau hauv lub tshuab nqus tsev, thiab mam li rov qab plaster pwm, thiab cov pwm yuav raug hloov kho thiab ua kom tiav.Thaum 2-4 hnub; Plaster pwm tsim tau yooj yim, lub sij hawm luv luv, conducive hloov cov khoom ntim, tus nqi tsawg, tab sis nrog tsawg ruaj , tom qab siv sij hawm tom qab siv, yooj yim puas lawm, cov khoom ntawm cov khoom siv tsis zoo yog qhov khoom ploj; Nws yog tsim rau thawj daim ntawv lees paub thiab qhov khoom siv nrog cov pob tshauv tsis zoo.
Roj Hmab pwm feem ntau yog ua raws li cov khoom tsim rau khoom tsim, gypsum pwm, plaster mould los ua lub tshuab nqus tsev, nrog cov kub tshwj xeeb kub resistant .